The growth and extension of the cotton, silk, lace and hosiery trades, in the district of Derby, created a great demand for skilled machine-makers and provided Fox with opportunities and he soon found ample scope for employment.
His lace machinery became celebrated, and he supplied it largely to the neighbouring town of Nottingham; he also obtained considerable employment from the great firms of Arkwright and Strutt –– the founders of the modern cotton manufacture.
Fox became celebrated for his lathes, which were of excellent quality, and besides making for British demand, he exported much machinery abroad, to France, Russia and Mauritius.
Fox is also said at a very early period to have invented a screw-cutting machine, an engine for accurately dividing and cutting the teeth of wheels, and a self-acting lathe, but details are obscure.
Fox machine tools were illustrated in contemporary literature and some survive as museum pieces in Birmingham and in Norway.